Alloy Definition and 97 Threads

This is the problem: An alloy of mass 25.0 grams was heated to 86.6 C and then placed in a calorimeter that contained 61.2 grams of water at 19.6 C The temp of the water rose to 21.3 , determine the specific heat of the alloy in J/gC Is this the correct way to set it up? c =...

Question at title. Out of curiosity.

Will switching to alloy wheels (typically 17% lighter than steel) noticibly improve fuel economy? It seems like we should be able to calculate a rough estimate if we had necessary data but i don't. Has anyone been there?

Homework Statement the critical field of an alloy at 12K and 14K is 12T and 8T. calculate the transition temperature of this alloy. Determine the critical field at 0K and 5K? Homework Equations Bc[/SUB]=Bo [1-(T/Tc)2] The Attempt at a Solution

Zinc Alloy parts( Zn, with small % of Al, Cu,Pb, etc) become corroded with age. Refurbishing (Restoring) involves removal of all plating, drilling out corrosion pits and filling with zinc solder. Badly corroded parts have patches of oxided metal surrounding the pits. This substantially reduces...

Hi guys I have produced an ingot of NiTiHf alloy through Vacuum Induction Melting (VIM) process and by using pure materials of Ni, Ti and Hf. Casting was done in a Y2O3-coated steel mold, and the crucible was made of graphite. The problem is that, when I homogenize the ingot at 1000 oC and...

Homework Statement A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of HCl(aq). When the liberated H2(g) is collected over water at 29C and 752 torr, the volume is found to be 313 mL. The vapor pressure of water at 29C is 30.0 torr. Homework Equations...

Homework Statement Hi there if you have an aluminium alloy with an uts of 400MPa and is tested to a ratio of 0.1 and the endurance limit is 10^7 cycles is 160MPA what is the mean stress with a stress amplitude of 160MPa, how do i work out the max and min stresses and using the Goodman...

Does anyone know how to find an effective mass for an alloy such as InGaAs?

Hi - just a quick question on notation. Take, for example, InxGa1-xAs . What is x? Thanks.

I am trying to make an metallic alloy consist of gallium and Molybdenum but it is all ways form in non-consist[homogeneous ] alloy… look to the attachment but in the market there is one … how I make it? Do I need to change the Temperature … or something else

I have a cold work Nitinol wire, my supervisor ask me to do heat treatment at 700 degree celcius after that quench in ice water.He tell me that after heat treatment, the wire will acquire the shape memory properties, but i have repeat for few sample the wire could not function. when i put the...

Hi there~ I have some questions about hydrogen storage alloys. (TiFe, ZrV2, LaNi5, Mg2Ni, etc.) As far as I know, the hydrogen sorption precesses are as following: Hydrogen molecules "physically" absorbed on the surface of alloy which is called alpha-phase. Hydrogen molecules become...

Homework Statement Constant for the diffusion of hydrogen through steel is D(steal) = 4 x 10^5 cm²/s. They try to improve steel tanks for hydrogen storage by applying the coating based on TiAlN alloys. What is the diffusion coefficient Dp of such coating, if the permeability of hydrogen is...

Homework Statement Constant for the diffusion of hydrogen through steel is D(steal) = 4 x 10^5 cm²/s. They try to improve steel tanks for hydrogen storage by applying the coating based on TiAlN alloys. What is the diffusion coefficient Dp of such coating, if the permeability of hydrogen is...

as depicted in the diagram below the stress strain for an alloy with an average nucleus size of 100 micron find 1)the modulus of elasticity for the alloy 2) the yielding stress for 1) i assume that the red line is meant to be at 0.0005 therefore E=dσ/dε=100e6/0.0005 E=200Gpa...

We have an application that requires the building of a mock-up for training firefighters. The mock-up will be steel (plate/sections and approximately 30 feet long and 10 foot high) and will be exposed to a fuel-rich propane fire (probably in the 600ºC or higher range). The duration of the fire...

Someone knows what is the most commonly used aluminum alloy in baking wares? Thanks for help... :)

Hello! I just registered on these forums and this is my first post here, so hopefully I did everything right. I recently got into metalworking in my spare time, and I am trying to create a metal alloy that will remain liquid at room temperature (a fusible, eutectic alloy). From what I've...

Homework Statement A Mg-Al alloy has a mass of 0.263 g and a density of 2.40 g/cm3. The density of pure Mg = 1.74 g/cm3 and for pure Al = 2.70 g/cm3. Calculate the % Mg in the alloy.Homework Equations D=M/VThe Attempt at a Solution Well I'm not really sure where to do. I solved for the volume...

Hello, My material science teacher posed an interesting question today. During the making of an alloy, would it be better to quench it or let it cool slowly? At first I thought the answer was obvious: quench it quickly so in the case the two elements have different melting temperatures...

Homework Statement Examine the ductility of the Al-Cu alloy. Note how brittle the mixture is- most unlike copper or aluminum-Why? 2. Relevant Information The alloy was a 50-50 mix of Al and Cu heated to 700C and then poured into a mold, before the eutectic temp was reached the...

I want to write a short-line code which can generate some configurations of a rough interface with small alloy disorder. The problem is stated in the following: two neighboring interface layer I & II Layer I is mainly consisted of atom A, but with substitutional disorder, i.e. some sites are...

A metal alloy consists of magnesium and aluminum.When a 1.00g sample of the alloy is reacted with excess HCl, 0.0989g of hydrogen gas forms. Calculate the percent composition of the alloy. Ok I got the following balanced equations : Mg + 2HCl -> MgCl2 + H2 2Al + 6Hcl -> 2AlCl3 + 3H2...

Homework Statement Determine the wt% of lithium required to obtain an Al-Li alloy with a density of 2.55 g/cm^3. Homework Equations The Attempt at a Solution I am so lost in this problem, any hints of how to start this problem with GREATLY appreciated!

Homework Statement Consider a cylindrical specimen of some hypothetical metal alloy that has a diameter of 10mm. A tensile force of 1500 N produces an elastic reduction in diameter of 6.7e-4mm. Compute the elastic modulus of this alloy, given that poisson's ratio is 0.35. Homework...

Homework Statement Aluminium-Lithium alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. A commercial aircraft skin material having a density of 2.47 g/cm3 is desired. Compute the concentration of Li (in wt%) that is required...

Homework Statement Germanium forms a substitutional solid solution with silicon. Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 2.43e21 Ge atoms per cubic centimeter. The densities of pure Ge and Si are 5.32 and 2.33 g/cm3 respectively...

OK, 4047 Aluminum is used for housing covers which are hermetically sealed using a laser welding process. Can anyone give me a reason why this specific alloy is used? Some spec on the alloy: http://www.jlanthonyandcompany.com/product/4047_aluminum.html I would figure if you had a housing...

Homework Statement The purpose of the lab is to determine the % comp of an alloy from the volume of hydrogen that is produced in the reaction. We did a lab, in which an alloy was reacted with hydrochloric acid, in a test tube with a stopper and tube leading to a 500ml sidearm flask, with a...

Hey guys I need a little help trying to identify or getting a good conclusion of what kind of aluminum I have here. These aluminum was grind and finally polished with aluminum oxide of 3 microns. After the etching of the alloy with Keller's Reagent for a couple of seconds we took the...

Hey guys, I'm working on a project and am looking for some fatigue data for aluminum alloys, A356-T6 in particular. I've looked through the MIL-5 and Aerospace (Cindas) handbooks and haven't found any decent information. The textbook I have "Mechanical Engineering Design" by Shigley and...

Homework Statement A hanging wire made of an alloy of titanium with diameter 0.15 cm is initially 2.8 m long. When a 109 kg mass is hung from it, the wire stretches an amount 1.41 cm. A mole of titanium has a mass of 48 grams, and its density is 4.54 g/cm^3. Based on these experimental...

Homework Statement The densities (at 25*C) of tin and lead are 7.3 g/cm3 and 11.3 g/cm3 respectively. Plumber's solder is an alloy of tin and lead and has a density of 9.7 g/cm3. Estimate the composition by mass, of the two metals in this solder. Homework Equations The Attempt...

I am going to heat treat Al alloy ribbons of low thickness (about 0.01 to 0.025 in). Could you please suggest me the time needed for solutionising as well as aging treatment if my heat treatment cycle for thick sample is as follows? Solutionization – 540C for 16 hrs Quench – Room temperature...

Recently, we purchased a relatively brand new high performance car engine to swap with our regular car engine for the purpose of gaining more horsepower. I need to find out the probability of corrosion of an aluminum alloy (possibly 319.0) part of a complete engine block brought to the shop...

First, here is the question: The percentage of two elements making up an alloy can be estimated from the following equations, which assume a simple mixing of the two components: Palloy=F1P1+F2P2 F1+F2=1 Here, F1 is the fraction of the alloy composed of element 1, and F2 is the fraction...

A simple question, if one has an alloy, are there effective ways to separate the different components and end up with the originale materials?

During the heat treatment of Aluminum alloys, two processes: Solution and Precipitation heat treatment were used. Should the hardness increase or decrease from the original alloy after solution heat treatment? My reference text says that the material should be "soft and ductile" after...

What's the difference between the dotted lines and the regular lines on the iron-carbon alloy diagrams?

Does anyone know any good titles for books concerning metal alloys (esp. memory alloys)? Thanks, -scott

i am looking for the papers a bout nd-fe-b alloy

Once again I've left homework to the last minute so my teacher will moan if i go ask him tomorrow morning. I've scanned the net and all my textbooks but can't seem to find a working example that helps with what i am doing. Could someone look at these 2 questions and help me out? 1. An alloy...

Hi, just looking into metals and came across silver copper alloy having a density of 9900 - 1.05e4 kg per cubic metre. I have been told me that the value of e is (probably quite randomly) 2.71 and others said that it is an abbreviation for 0, eg. 1,000,000 could be written as 1e6 or 10,000 as...

Is it the case that an Aluminium alloy will change strength (yield/ultimate) if subjectet to a varying load instead of a static one? I can't quite see why it should...can someone help me with this?

I need the test methods for the Li alloy powders. What type of a test is needed to determine the content of the alloy? For instance Li-Al alloy? I couldn't find a suitable test for these powders (as known, these alloy powders are air and humidity sensitive, difficult to handle)

I am having troubles with my homework assignment on this question A lead-zinc alloy has a density of 10 Mg/m3 What is the weight % of the zinc?